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HLT.htm
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HLT.htm
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<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<HTML>
<HEAD>
<TITLE>80386 Programmer's Reference Manual -- Opcode HLT</TITLE>
</HEAD>
<BODY STYLE="width:80ch">
<B>up:</B> <A HREF="c17.htm">
Chapter 17 -- 80386 Instruction Set</A><BR>
<B>prev:</B><A HREF="ENTER.htm"> ENTER Make Stack Frame for Procedure Parameters</A><BR>
<B>next:</B><A HREF="IDIV.htm"> IDIV Signed Divide</A>
<P>
<HR>
<P>
<H1>HLT -- Halt</H1>
<PRE>
Opcode Instruction Clocks Description
F4 HLT 5 Halt
</PRE>
<H2>Operation</H2>
Enter Halt state;
<H2>Description</H2>
HALT stops instruction execution and places the 80386 in a HALT state.
An enabled interrupt, NMI, or a reset will resume execution. If an
interrupt (including NMI) is used to resume execution after HLT, the saved
CS:IP (or CS:EIP) value points to the instruction following HLT.
<H2>Flags Affected</H2>
None
<H2>Protected Mode Exceptions</H2>
HLT is a privileged instruction; #GP(0) if the current privilege level is
not 0
<H2>Real Address Mode Exceptions</H2>
None
<H2>Virtual 8086 Mode Exceptions</H2>
#GP(0); HLT is a privileged instruction
<P>
<HR>
<P>
<B>up:</B> <A HREF="c17.htm">
Chapter 17 -- 80386 Instruction Set</A><BR>
<B>prev:</B><A HREF="ENTER.htm"> ENTER Make Stack Frame for Procedure Parameters</A><BR>
<B>next:</B><A HREF="IDIV.htm"> IDIV Signed Divide</A>
</BODY>